Molded object in imitation of porcelain.



MAURICE PONTIO, or PARIS, FRANCE.

MOLDED OBJECT IN IMITATION OF PORCELAIN.

No Drawing.

To all whomitf may concern:

Be it known that I, MAURICE Pon'rro, citi zen of the Republic of France,residin at 7 Rue Legraverend, Paris, in the Repu lie of France, haveinvented new and useful Improvements in Molded Objects in Imitation ofPorcelain, of which the following is a specification.

The object of the present invention is the manufacture of heads andbodies for dolls and in general the production of all objects capable ofbeing molded, especially busts, statuettes, bases, dress forms,artificial limbs, photographic trays or dishes for various purposes anddivers parts for all kinds of apparatus, such manufacture being carriedout by the following process.

The material used for producing these objects consists essentially of amixture of mineral 1powders, such as talc, kaolin, plaster of ar's,Spanish white, or Meudon white, etc, made up by the use of an aqueoussolution of gelatin or gelose mixed with casein, such mixture bemg usedalone or together with in arabic or any other adhesive mucilaglnoussubstance.

In this way, there is formed a paste'which is applied in successivelayers in a mold in order to obtain dolls heads and bodies, and theseare afterward rendered insoluble by placing them in a bath of formicaldehyde or any other product which willrender gelatin insoluble. Afterdrying, the materlal is decorated and varnished as may be required.

Hardenin is produced by the drymg of the materia in which the gelatinhas been rendered insoluble by the action of the formol.

As the process of rendering material insoluble by formol is a very slowone, there is no disadvantage in using the action of the latter beforethe molding, if desired, for the paste will remain liquid for a certaintime.

In this latter case the paste containing the formol already added, isapplied in succes-, sive layers in the mold as above mentioned, andafter drying it is decorated and varnished as may be required.-

Specification of Letters Patent.

Application filed J une 1, 1917. Serial No. 172,885.

It will thus' be seen that the formol treatment can be carried outeither before or after the molding.

The following method of operating is preferable:

- The operation is commenced by dissolving casein in a water bathin acertain quantity of boiling water (with a minimum of 10 grams of caseinper 100 grams water) this being rendered alkaline by adding a few dropsof ammonia or caustic soda solution. The casein can be considered assufliciently dissolved when no grains are seen upon the bottom of thevessel.

To the above solution there is added sheet gelatin (with a minimum of1'0 grams of gelatin per 100 grams water), then arabic of the weight ofthe gelatin) w i dli has been previously dissolved in hot water andfiltered through cloth, and lastly the mineral powders in variablequantity and number according tothe appearance and size of the objectwhich it may be desired to obtain, as well as the required amount ofcoloring matter to obtain the desired color for the paste. This mixtureis stirred constantly until it becomes quite homogeneous and is thenallowed to cool, but this under a .constant stirring. While still in theliquid state, the above paste is used to prepare a hollow object byapplying it in successive layersinside a mold, and it is allowed tosolidify until completely cold. The molded object is now removed fromthe mold and placed for several hours in a 15 per cent. formol solution,then it is dried in an oven whose temperature is gradually varied from25 to 80 degrees centigrade. Lastly, it is polished and decoratedaccording to the case.

Objects obtained by this process are very strong, and the expense is aminimum.

Having now described my invention what I claim as new and desire tosecure by Letters Patent is:

1. A molded object in imitation of porcelain containing an impalpablepowder, a coloring substance, a solution of alkaline case- Patented Feb.4, 1919.

' inate, an aqueous solution. of gelatin, a gum In testimony whereof Ihave signed my and formol, substantially as described and name to thisspecification in the presence of 10 for t1: puiggie soet forth. f twosubscribing witnesses.

2. mo 0 ject in imitation'o porce- 5 lain containing an impalpablepowder, a 1 MAURICE PONTIO solution of alkaline caseinate, an a ueousWitnesses: solution of gelatin, a gum, and formo sub- Loms Mosns,stantially as described. CHAS, P. Pnnssmr.

